Amazon is beginning to build its own trucking fleet just in time for Christmas. The online retailer has purchased several thousand truck trailers and will drive cargo between different Amazon warehouses and shipment centers, reports Re/code.

Amazon just purchased the trailers that are pulled by a tractor in a standard tractor-trailer; the truck rollouts are nationwide and will rely on using the retailer’s partners to actually truck the trailers from warehouse to warehouse, explains Re/code’s Jason Del Rey.

The major acquisition takes place as UPS, FedEx, the USPS, and other shipping companies are expecting an especially busy holiday shipping season as more consumers shift from buying gifts at brick-and-mortar stores to shopping online.